Which of the following is not required on a correctly completed requisition?

A correctly completed requisition for laboratory tests or procedures typically includes essential information to ensure accurate patient identification and appropriate testing. One of the key components is the patient name, as it serves to uniquely identify the individual undergoing the testing.

The test type is also critical, as it specifies what analysis or procedure is required, guiding the laboratory in processing the sample correctly. Likewise, the ordering physician's details are vital since they indicate who has requested the test and serve as a point of contact for any follow-up questions or clarifications.

While patient history can be informative, it is not always a mandatory requirement on requisitions. It may provide useful context for the physician or lab to interpret results, but the absence of patient history does not typically hinder the processing of a test. This distinction is why patient history is the correct answer to be considered optional in a requisition.